基于电磁原理的接地网导体缺陷诊断方法研究  

Research on defect diagnosis method of grounding grid conductor based on electromagnetic principle

作　　者：吴慧芳[1] 杨波[1] 陈明华 WU Hui-fang;YANG Bo;CHEN Ming-hua(Guangxi Electrical Polytechnic Institute,Nanning 530007,China;China Energy Engineering Group Guangxi Electric Power Design Institute Co.,Ltd.,Nanning 530007,China)

机构地区：[1]广西电力职业技术学院,南宁530007 [2]中国能源建设集团广西电力设计研究院有限公司,南宁530007

出　　处：《广西水利水电》2022年第2期93-96,共4页Guangxi Water Resources & Hydropower Engineering

摘　　要：介绍了基于电场及磁场原理的接地网缺陷诊断的两种基本方法,结合了电磁场的相关原理和方法。主要利用了MATLAB软件编程求取存在缺陷接地网的电磁感应强度及地表电位的数值,通过电场及磁场两个角度来对变电站接地网导体进行诊断,并且对两种诊断方法的特点加以仿真以及分析,通过定义地网导体的缺陷特征值及波形变化的畸变率THD两个维度对接地网导体的缺陷诊断效果展开分析与研究。研究结果表明,通过地表电位进行变电站接地网导体的缺陷诊断的效果更好,导体缺陷诊断的可视化程度更高。The authors present two methods of grounding grid defect diagnosis based on the principle of electric field and magnetic field. Combined with relevant principles and methods of electromagnetic field, MATLAB software programming is used to obtain the values of electromagnetic induction intensity and surface potential of grounding grid with defects. Diagnosis of substation grounding grid conductor was conducted from two angles of electric field and magnetic field. The characteristics of two diagnosis methods are simulated and analyzed. By defining the defect characteristic value of grounding grid conductor and the distortion rate THD of waveform change, the defect diagnosis effects of grounding grid conductor was analyzed and studied. The results of research show that the effect of defect diagnosis of substation grounding grid conductor by surface potential renders better effect with higher visualization degree.

关 键 词：变电站 接地网 缺陷诊断 地表电位 电磁感应强度 

分 类 号：TM862[电气工程—高电压与绝缘技术]